Oracle Database 10g Release 2 10.2.0.5 Download New 'link' -

You must have an active Oracle Database product license and a valid Customer Support Identifier (CSI) .

Oracle released a limited set of Full Install binaries for 10.2.0.5. These are not available via public OTN but are accessible via (formerly EDelivery). Oracle Database 10g Release 2 10.2.0.5 Download NEW

If you are looking for this download, you are likely trying to patch a legacy system. You must have an active Oracle Database product